Because a new book offering an insight into the now President of the United States' campaign trail has revealed his gutbusting usual order from the golden arches.

Let Trump Be Trump reveals the scenes on board his 'Trump Force One' campaign jet - with claims of aides "being screamed at" and Donald Trump ordering his pilot to flow lower so he could get better phone signal.

And among the odder insights are claims the then-candidate would play Elton John songs at ear-splitting volumes on his private jet.

But the new book by Corey Lewandowski, who was fired as Trump’s campaign manager, and another aide David Bossie, also lays bare some incredible claims on Mr Trump's taste for fast food, according to the Washington Post .

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It goes on to note “the orchestrating and timing of Mr. Trump’s meals was as important as any other aspect of his march to the presidency”, and that they would carefully time fast food meals to be delivered to the candidate’s plane as he finished speaking at an event.

They also say that the jet's cupboards were stacked with Vienna Fingers (which are like large custard creams), crisps, pretzels and Oreos - and Mr Trump would only ever eat from a previously-unopened packet.